Transcript for Afghanistan Suicide Bombing Shifts U.S. Troops' Orders
Now we bring you overseas to what happened today with angry protests. There were sporadic demonstrations in ten countries still citing the anti-islamic movie. But in afghanistan, a bomb attack as... See More
Now we bring you overseas to what happened today with angry protests. There were sporadic demonstrations in ten countries still citing the anti-islamic movie. But in afghanistan, a bomb attack as 70,000 troops receive dramatic new orders and abc's mohammed lila has those details. Reporter: It happened without any warning. A toyota corolla, packed with explosives, rammed into a van this morning, leaving behind a massive crater, and explosion heard around the city. Take a look. This is all that's left of the vehicle -- the engine block now a piece of charred metal. The blast so strong -- look behind me, you seat building? It blew out windows more than 200 feet away. This is the latest revenge for the anti-islam video causing outrage in the muslim world. Here in afghanistan, it wouldn't have come at a worse time. U.S. Troops are fighting off a wave of insider attacks by the very afghans they are trading. Add in this video and intense feeling it's caused we think it's added additional threats to our troops. Reporter: Those threats are so serous troops on the frontlines are temporarily pulling back. No longer going on joint patrols. They've long been seen as crucial training. A way to begin afghan troops up to speed before troops withdraw in 2014. As we saw first hand this summer, some afghan battalions simply aren't ready. On this mission they refuse to fight demanding air support to bail them out. Some might say this is a way out? We don't see it that way. It's relatively short-lived. Reporter: That may be but at least for now the afghans will take on the taliban mostly on their own. Mohammed lila abc news kabul.
This transcript has been automatically generated and may not be 100% accurate.